Ore-separating apparatus.



R. D. FASSETT;

ORE SEEARATING APPARATUS. ."APPLICATION FILED NOV. 9, 19H.v

Patented Feb. 29, 1916.

2 SHEETS-SHEET l.

Wi Imeooeo elfbtofcmu l M/Mm R. D. FASSETT.

ORE sEPARATlNG APPARATUS.

APPLICATION FILED NOV. 9, I9I4.

Patented Feb. 29,1916.

2 SHEETS-SHEET 2.

THB CGI-"MEM PLANGGIAPII U0., WASHINGTON, D. C

UNITED STATES PATENT GFFTCE.

RILEY D. FASSETT, OF DENVER, COLORADO, ASSIGNOR, BY vDIRECT AND MESNE ASSIGN- MENTS, TO THE GOLD-DUST CONCENTRATION COMPANY, 0F DENVER, COLORADO, A

CORPORATION .OF COLORADO.

ORE-SEPARATING .APPARATUS.

Application led November 9, 1914.

To all whom t may concern:

Be it known that I, RILEY D. FAssE'r'r, a citizen of the United States, residing in the city and county of .Denver and State of Colorado, have invented certain new and useful Improvements in Ore-Separating Apparatus; and I do declare the following to be a full, clear, and exact description of the invention,- such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

My invention relatesto improvements ,in ore separating apparatus, my object being to provide an apparatus of this class adapted to separate the precious metal values from the gangue with which they are mingled. The material to be treated may be either in the form of pulverized rock or placer material.

My improved apparatus comprises .a washing or vibrating table, vthe latter being reciprocated'laterally and adapted to be inclined both .transversely and longitudinally.

Having briefly outlined my improved ore separating apparatus, I will proceed to describe the same4 in detail, reference being made to the accompanying drawing, in which is illustrated an embodiment thereof.

In this drawing, Figure l is a top plan view of my improved ore washer, or concentrator. F ig. 2 is a cross section of the ore .washing table, taken on the line 5-5, F ig. 1. Fig. 3 is an elevation of this table viewed in the direction of arrow 6, Fig. 2.

The same reference characters indicate the same ,parts in all the views.

Let the numeral 45 designate the concentrating table or ore washer. This table Vis composed of a fiat top 46 which is surrounded on three sides by an upright rim 47, one side, or that opposite 'the location 44 where the material reaches the table and designated by the numeral 48, is rimless or plain, whereby the material is 4allowed to escape from the table, to a trough 49. This table has a relatively small portion of its area provided with riffles 50 which extend from the rim or upright wall part 51, toward the opposite wall part 52. These rittles, however, extend only part way across the table, and are arranged to lprevent the Specification of Letters Patent.

APatented Feb. 29, 1916.

serial No. 871,083.

material fed to the head or location 44 thereof 'from passing over the tail end or side 48 to the trough 49 before it has been properly treated. Arranged diagonally of the table and parallel with a part 53 of the wall thereof which forms an obtuse angle with the part 52 and a similar angle with `the short wall part 54 at the head of the table and adjacent the location 44 where the material is fed thereto, is a wash water trough 55, the said trough being suspended a short distance above the table by means of rods 56 -whose upper extremities may be connected with any suitable support (not shown). The bottom of this trough is perforated as shown at '57 and water is delivered thereto .from a valve controlled supply vpipe 58.

.act directly upon a cushion member 66 which is secured to the depending arm 67 of this bracket.

A stationary shaft 68 is arranged below the table and extends transversely of the central portion thereof. This shaft is mounted in a stationary yoke 69 composed of two parallel members 70, whose extremities merge into each other, as shown at 71, and through which one extremity 72 of the shaft 68 passes, a nut 73 being applied to this extremity of the shaft beyond an upright bracket 74 having a vertical slot 75 through which the part 72 of the shaft passes, the slot, however, being bridged by the nut73 to permit the vertical adjustment of this end of the shaft, for the purpose of impart-ing to or changing the lateral inclination of the table, the last named movement beingeffected through the medium of a vertically disposed screw 76 whose lower extremity is swiveled in the yoke, as shown at 77, and whose upper portion is threaded in the upper part 7 8 of the bracket 74. By

loosening the nut 7 8 and turning the screw 76, the shaft 68 may be inclined for the purpose of imparting a corresponding lateral inclination to the table whenever it may be necessary or desirable so to do. Attention is called to the fact that by loosening the nut 78, the shaft 68 may be turned to tilt the table 45 longitudinally and held in the desired position by tightening the said nut.

Mounted on the shaft 68 and made fast thereto, are two collars 7 9 which are spaced on the shaft and provided with upright projections 80 to which are respectively made fast the central portions 81 of two U-shaped leaf springs 82 and 88. The parts 81 which are secured to the projections 80 are the central portions of the parallel side members of these two springs, each spring having relatively short end members 84 whose extremities are secured to the depending members 85 of angle brackets 86 whose horizontal members 87 are made fast to the table 46. Hence, when the actuator 60 is in motion and acts upon the bracket 64, movement is imparted to the table in the direction of the axis of the shaft 68. It will be observed that the actuator moves the table in one direction, whereby the springs 82 and 88 are placed under tension, the recoil action of the springs imparting the return movement after each roller engages the bracket 64 and before the next roller is in position to act upon this bracket. In this way, a horizontal vibratory movement is imparted to the table, whereby the material thereon is subjected to the necessary washing treatment.

The actuator 60 is momited on an operating shaft 88 journaled in the frame work 59 as shown at 89, and also in boxes 90 formed at the extremities of the yoke arms 70. Movement is imparted to this shaft from a pulley 91 fast on the shaft and employed in connection with a loose companion pulley 92. When the material is deposited upon the table, the heavier particles of course, will lie adjacent the upper surface of the table and the lighter particles above the heavier. Then the operation of the actuator 60, together with the springs 82 and 88, will reciprocate the table 45 transversely and the nature of the motion imparted by the said actuator and springs is such that the table will be given successive jerks sufficient to make the heavier material which is adjacent the surface of the table, travel from the edge 51 toward the edges 52 and 58. During this operation, water from the trough 55 is continually vwashing diagonally over the material and which will pick up the lighter particles, separate them from the heavier, and discharge them over the lower portion of the edge 48 into the trough 49. In the meantime, the heavier particles which have been carried by the reciprocation of the table toward the edges 52 and 58, will be discharged over the upper portion of the edge 48 or above that portion over which the lighter or ner particles are discharged. In other words, the material passing over the edge 48 will graduate from the finest particles adj acent the edge 51, to the coarsest ones adjacent the edge 52. The trough 49 is divided into sections by partitions 4, each section receiving a different grade of material. Each of these sections has an opening 8 in its bottom, through which the several grades of material may be discharged for any further treatment that may be desired. In order to carry out the aforesaid operation most etticiently, the table should be slightly inclined transversely, whereby the edge 51 is lowermost.

Attention is particularly called to the nuts 98 and 94 mounted upon the shaft 68 adj acent one of the collars 79. By turning the nut 98 in one direction, the adjacent collar 79 is pushed inwardly upon the shaft 68l and thus the spring 82, which is supported by said collar, is placed under tension and produces a like result upon the spring 88, where-` by the movement of the table in the direction the reverse to that imparted by the actuator will be quicker than if the springs 82 and 88 were in their normal position. The said springs 82 and 88 can be made to resume their normal positions by screwing the nut 98 in the opposite direction, the nut 94 of course, being adapted to lock the nut 98 in any desired position.

From the foregoing description, it will be readily seen that the rapidity of the return movement of the table may be regulated as occasion may demand.

Having thus described my invention, what I claim is,-

1. A concentrating table or washer comprising a table member and means for reciprocating the same, said means including two U-shaped springs, a stationary support to which the central portion of said springs are secured, the extremities of both springs being secured to the table on opposite sides of their centers, and means acting on the central part of the table for intermittently imparting movement thereto in one direction, whereby the springs are placed under tension and alone serve to intermittently impart reverse movement.

2. The combination with a table, of a stationary member arranged therebeneath, leaf springs having their central portions secured to said stationary member and extending underneath the Atable and on opposite sides of said member, the opposite ends of the springsbeing secured to the table and constituting its support, an actuator arranged to engage the table centrally between the extremities of the springs for imparting intermittent movement thereto in one direction, the recoil of the Springs serving to impart intermittent reverse movement and means independent of the actuator for regulating the tension under which the springs may be placed, for the purpose set forth.

3. The combination with a table, of a stationary shaft extending underneath the table and transversely thereof, leaf springs mounted on said shaft and extending at right angles thereto, their extremities being secured to the table at suitable points on opposite sides of the shaft, said springs forming the support for the table, means for imparting movement to the table intermittently in one direction, whereby the springs are placed under tension and serve to impart the return reciprocating strokes, and means also mounted upon the shaft for compressing the springs to regulate said tension.

4. The combination with a frame work and a table, of a yoke, an operating shaft journaled in the yoke at one extremity, the opposite extremity of the yoke being vertically adjustable, springs mounted on the yoke, connected with the table and forming the support for the latter, an actuator arranged to engage the table for imparting intermittent movement thereto in one direction, whereby the springs are placed under tension and serve to impart return intermittent movement and means for regulating said tension, for the purpose set forth.

5. The combination with a table, a yoke extending underneath the table and transversely thereof, leaf springs whose central portions are secured to the yoke and whose extremities are attached to the table on opposite sides of the yoke, means for imparting intermittent movement to the table in a direction parallel with the yoke, whereby the springs are placed under tension and serve to impart the reverse intermittent movement and means for compressing the springs to regulate the tension under which they are adapted to be placed by the first named means.

6. The combination with a table, a member supported underneath the table and extending transversely thereof, a spring whose central portion is secured to the said member and whose extremities are attached to the table, means for imparting movement to the table intermittently in one direction, whereby the springs are placed under tension, and means independent of the first named means for regulating said tension, substantially as described.

In testimony whereof I aiix my signa-ture in presence of two witnesses.

RILEY D. FASSETT.

Witnesses MAZE KIRBY, A. EBERT OBRIEN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington. D. C. 

